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Finding the Third Proportional to 139,888 and 211,001

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Solution

The third proportional to 139,888 and 211,001 is: 318,264.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,888 : 211,001 = 211,001 : x
  2. Step 2: Convert to fraction form
    139,888/211,001 = 211,001/x
  3. Step 3: Cross multiply
    139,888x = 211,001 × 211,001
  4. Step 4: Simplify right side
    139,888x = 44,521,422,001
  5. Step 5: Solve for x
    x = 44,521,422,001/139,888
  6. Step 6: Final answer
    x = 318,264.77

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.